Functions of melatonin in plants: a review

@article{Arnao2015FunctionsOM,
  title={Functions of melatonin in plants: a review},
  author={Marino Ba{\~n}{\'o}n Arnao and Josefa Hern{\'a}ndez-Ruiz},
  journal={Journal of Pineal Research},
  year={2015},
  volume={59}
}
The number of studies on melatonin in plants has increased significantly in recent years. This molecule, with a large set of functions in animals, has also shown great potential in plant physiology. This review outlines the main functions of melatonin in the physiology of higher plants. Its role as antistress agent against abiotic stressors, such as drought, salinity, low and high ambient temperatures, UV radiation and toxic chemicals, is analyzed. The latest data on their role in plant… 
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Agricultural Crops

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References

SHOWING 1-10 OF 167 REFERENCES

Functional roles of melatonin in plants, and perspectives in nutritional and agricultural science.

Evidence indicates that melatonin has an ability to increase the production of crops and may involve the roles of melatonin in preservation of chlorophyll, promotion of photosynthesis, and stimulation of root development.

Melatonin: A potential regulator of plant growth and development?

There is no known specific role for melatonin in plant physiology, but growing information describing melatonin control of physiological processes in mammals, yeast, and bacteria, including diurnal responses, detoxification of free radicals, and environmental adaptations.

Growth conditions influence the melatonin content of tomato plants.

Melatonin in plant organs

The melatonin content of the fruits generally increased during ripening up to the mature ripe stage and thereafter as the fruit became over ripe, as it does in many animals.

Melatonin in higher plants: occurrence and possible functions

Melatonin was shown to delay flower induction in some photoperiodic plants and in the dinoflagellate Lingulodinium it replaces, in part, the requirement of darkness for cyst formation.

Chemical stress by different agents affects the melatonin content of barley roots

The data establish, for first time, that the chemical‐stress agents assayed can induce the biosynthesis of melatonin in barley roots and produce a significant increase in their melatonin content.

Lowering intercellular melatonin levels by transgenic analysis of indoleamine 2,3‐dioxygenase from rice in tomato plants

The results suggest the involvement of IDO in plant melatonin metabolism and a possible role in plant leaf development.

Phytomelatonin: Discovery, Content, and Role in Plants

Its ability to strengthen plants subjected to abiotic stress such as drought, cold, heat, salinity, chemical pollutants, herbicides, and UV radiation makes melatonin an interesting candidate for use as a natural biostimulating substance for treating field crops.

Phytomelatonin: Assisting Plants to Survive and Thrive

This review summarizes the advances that have been made in terms of the identified functions of melatonin in plants and calls for scientists to join the endeavor of clarifying the function of this phylogenetically-ancient molecule in plants, particularly in reference to the mechanisms by which melatonin mediates its multiple actions.

The Physiological Function of Melatonin in Plants

The common biosynthetic pathways shared by the auxin, indole-3-acetic, and melatonin, which suggest a possible coordinated regulation in plants, are presented.
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